#include<stdio.h>

int main(){
	int year,month;
	scanf("%d %d",&year,&month);
	switch(month){
		case 1:
		case 3:
		case 5:
		case 7:
		case 8:
		case 10:
		case 12:printf("31");break;
		case 2:if((year%4==0&&year%100!=0)||year%400==0) printf("29");
					else printf("28");break;
		case 4:
		case 6:
		case 9:
		case 11:printf("30");break;
	}
	return 0;
}
